Debate: Is Summorum Pontificum a failure?

On July 7 2007, Pope Benedict XVI published a Motu Proprio, Summorum Pontificum, which swept away restrictions on the Extraordinary Form of the Mass.

At the time, commentators predicted that it would bring the pre-Vatican II Mass back into the mainstream, and transform the liturgical culture of the Church. But three years on, only a tiny minority of Catholics have access to the traditional Latin Mass.

So was Pope Benedict’s initiative a failure, or is it still too early to tell?